Cayuga is an expressive and scalable Complex Event Processing (CEP) system developed at the Cornell Database Group. The system is implemented in C++, and runs on Windows, Linux, and Mac OS X. See its Wiki page, or google "Cornell Cayuga" for details.

The project aims to create a set of test databases which might satisfy a given query Q.So given a query Q the s/w generates result R and input databases D such that Q(D) = R.The software has applications in functional verification of query processors

EmbedDB is a set of simple APIs for interacting with embedded databases in an intuitive fashion. It aims to implement each language binding in an identical way, enforcing binary compatibility, and leveraging the host language's standard structural types

Jaxup is an XML update engine written in Java to work against
a variety of XML based object models such as DOM,
dom4j and JDOM. It supports the xupdate standard draft and
will support other xml update standards as they become available.

Jukuu is a bilingual sentence search engine. According users' queries, It helps users to search similar sentences of another language. With high performance architecture, It can retrieve result sets from billion sentence pairs within 0.0001s.

Lyophilizer helps developers create systems of JavaBeans without worrying about different persistent/transactional/secure back ends. It is evolving into JDO and currently supports JDBC, EJB and in-memory storage.

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